18857889688 has 48 divisors (see below), whose sum is σ = 39397722840. Its totient is φ = 8454314880.

The previous prime is 18857889683. The next prime is 18857889697. The reversal of 18857889688 is 88698875881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18857889683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62770 + ... + 204097.

Almost surely, 2^18857889688 is an apocalyptic number.

It is an amenable number.

18857889688 is an abundant number, since it is smaller than the sum of its proper divisors (20539833152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18857889688 is a wasteful number, since it uses less digits than its factorization.

18857889688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266968 (or 266953 counting only the distinct ones).

The product of its digits is 495452160, while the sum is 76.

The spelling of 18857889688 in words is "eighteen billion, eight hundred fifty-seven million, eight hundred eighty-nine thousand, six hundred eighty-eight".